Method for transmitting channel state information and device thereof

ABSTRACT

Disclosed in an embodiment of the present invention is a method for transmitting channel state information and device thereof. By applying the technical schemes of the embodiment of the present invention, in a LTE-A system using PUCCH reporting mode 1-1, in a situation where PMI feedback for 8 antenna ports is needed to be reported in a sub-frame and PUCCH capacity is limited, therefore codebook compression is required, a corresponding relationship definition of the pre-coding matrix indicator information or the pre-coding matrix indicator information pair and the codebook index or the codebook index pair after codebook compression is provided, thus realizing the feedback and receiving of channel state information between a base station and terminal equipment.

This application requires the priority to Chinese patent application,which should be submitted to the Chinese Patent Office on Nov. 8, 2010,the application No. 201010539050.9, invention name as “Method ForTransmitting Channel State Information And Device Thereof”, with all ofits content by reference in this application.

FIELD OF THE PRESENT INVENTION

The present invention relates to the field of communication technology,in particular to the method for transmitting channel state informationand device thereof.

BACKGROUND OF THE PRESENT INVENTION

In a Multiple-Input Multiple-Output (MIMO) system, if a transmitter isable to be somehow informed of the channel information, the optimizationon the transmitted signal can be available according to channelcharacteristics so as to improve the quality of receiving and reducecomplexity requirements on the receiver. The feedback for channelinformation is usually achieved by the way of quantifying channelinformation in actual systems, so as to reduce feedback overhead, thusimproving transmission efficiency of the system.

In Long Term Evolved (LTE) system, a codebook-based implicit ChannelState Information (CSI) feedback method is adopted. User Equipment (UE,namely, terminal equipment) measures the downlink channels based onpilots and reports Rank Indication (RI) that downlink can support andPrecoding Matrix Indicator (PMI) to a base station according to its ownreceiving processing algorithm. Meanwhile, UE further needs to reportChannel Quality Indicator (CQI) of each codeword. Therein, during thecalculation of CQI, UE assumes that the base station uses itsrecommended RI/PMI.

In LTE system, PMI is defined as follows:

For 2 antenna ports {0, 1} and corresponding RI value which is 1, thePMI value nε{0, 1, 2, 3} shall correspond to the codebook index n in υ=1in the Table 1 below (a corresponding relationship of pre-coding matrixindicator information in LTE system with the codebook index in thecodebook for 2 antenna ports);

For 2 antenna ports {0, 1} and corresponding RI value which is 2, thePMI value nε{0, 1} shall correspond to the codebook index n+1 in υ=2 inTable 1 below;

For 4 antenna ports {0, 1, 2, 3} and corresponding RI value which is 2,the PMI value nε{0, 1, . . . , 15} shall correspond to the codebookindex n in υ=RI value in the below Table 2 (a corresponding relationshipof pre-coding matrix indicator information in LTE system with thecodebook index in the codebook for 4 antenna ports).

TABLE 1 Codebook Rank index 1 2 0 $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\1\end{bmatrix}$ $\frac{1}{\sqrt{2}}\begin{bmatrix}1 & 0 \\0 & 1\end{bmatrix}$ 1 $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 1 \\1 & {- 1}\end{bmatrix}$ 2 $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 1 \\j & {- j}\end{bmatrix}$ 3 $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\{- j}\end{bmatrix}$ —

TABLE 2 Codebook Rank υ index u_(n) 1 2 3 4 0 u₀ = [1 −1 −1 −1]^(T) W₀^({1}) W₀ ^({14})/{square root over (2)} W₀ ^({124})/{square root over(3)} W₀ ^({1234})/2 1 u₁ = [1 −j 1 j]^(T) W₁ ^({1}) W₁ ^({12})/{squareroot over (2)} W₁ ^({123})/{square root over (3)} W₁ ^({1234})/2 2 u₂ =[1 1 −1 1]^(T) W₂ ^({1}) W₂ ^({12})/{square root over (2)} W₂^({123})/{square root over (3)} W₂ ^({3214})/2 3 u₃ = [1 j 1 −j]^(T) W₃^({1}) W₃ ^({12})/{square root over (2)} W₃ ^({123})/{square root over(3)} W₃ ^({3214})/2 4 u₄ = [1 (−1 − j)/{square root over (2)}−j (1 −j)/{square root over (2)}]^(T) W₄ ^({1}) W₄ ^({14})/{square root over(2)} W₄ ^({124})/{square root over (3)} W₄ ^({1234})/2 5 u₅ = [1 (1 −j)/{square root over (2)}j (−1 − j)/{square root over (2)}]^(T) W₅^({1}) W₅ ^({14})/{square root over (2)} W₅ ^({124})/{square root over(3)} W₅ ^({1234})/2 6 u₆ = [1 (1 + j)/{square root over (2)}−j (−1 +j)/{square root over (2)}]^(T) W₆ ^({1}) W₆ ^({13})/{square root over(2)} W₆ ^({134})/{square root over (3)} W₆ ^({1324})/2 7 u₇ = [1 (−1 +j)/{square root over (2)}j (1 + j)/{square root over (2)}]^(T) W₇ ^({1})W₇ ^({13})/{square root over (2)} W₇ ^({134})/{square root over (3)} W₇^({1324})/2 8 u₈ = [1 −1 1 1]^(T) W₈ ^({1}) W₈ ^({12})/{square root over(2)} W₈ ^({124})/{square root over (3)} W₈ ^({1234})/2 9 u₉ = [1 −j −1−j]^(T) W₉ ^({1}) W₉ ^({14})/{square root over (2)} W₉ ^({134})/{squareroot over (3)} W₉ ^({1234})/2 10 u₁₀ = [1 1 1 −1]^(T) W₁₀ ^({1}) W₁₀^({13})/{square root over (2)} W₁₀ ^({123})/{square root over (3)} W₁₀^({1324})/2 11 u₁₁ = [1 j −1 j]^(T) W₁₁ ^({1}) W₁₁ ^({13})/{square rootover (2)} W₁₁ ^({134})/{square root over (3)} W₁₁ ^({1324})/2 12 u₁₂ =[1 −1 −1 1]^(T) W₁₂ ^({1}) W₁₂ ^({12})/{square root over (2)} W₁₂^({123})/{square root over (3)} W₁₂ ^({1234})/2 13 u₁₃ = [1 −1 1 −1]^(T)W₁₃ ^({1}) W₁₃ ^({13})/{square root over (2)} W₁₃ ^({123})/{square rootover (3)} W₁₃ ^({1324})/2 14 u₁₄ = [1 1 −1 −1]^(T) W₁₄ ^({1}) W₁₄^({13})/{square root over (2)} W₁₄ ^({123})/{square root over (3)} W₁₄^({3214})/2 15 u₁₅ = [1 1 1 1]^(T) W₁₅ ^({1}) W₁₅ ^({12})/{square rootover (2)} W₁₅ ^({123})/{square root over (3)} W₁₅ ^({1234})/2

Wherein, W_(n)=I−2u_(n)u_(n) ^(H)/u_(n) ^(H)u_(n), I refers to unitmatrix of dimension 4×4, u_(n) ^(H) represents the conjugate transposeof u_(n).

In Long Time Evolved Advanced (LTE-A) system, the codebook-basedimplicit CSI feedback method is further adopted. In order to improve theaccuracy of PMI feedback, in LTE-A, a pre-coding matrix (W) is formed bymerging two matrixes (W1 and W2); W1 and W2 are indicated by two PMIsrespectively (the first PMI value, corresponding to W1; and the secondPMI value, corresponding to W2).

The codebook in LTE version R8/9 is still used in 2 antenna ports and 4antenna ports; W1 is defined as a unit matrix, while the first PMI valuecontains 0 bit of information, no feedback is required. Specifically,the corresponding relationship of pre-coding matrix indicatorinformation in LTE-A system with the codebook index in the codebook for8 antenna ports is shown is in Table 3 to Table 10.

Table 3 refers to codebook for 1-layer CSI reporting using antenna ports15 to 22 (the codebook for 1-layer CSI reporting using 8 antenna ports(ports 15 to 22)), namely, Rank 1 codebook for 8 antenna ports in LTE-Asystem.

TABLE 3 i₂ i₁ 0 1 2 3 4 0-15 W_(2i₁, 0)⁽¹⁾ W_(2i₁, 1)⁽¹⁾W_(2i₁, 2)⁽¹⁾ W_(2i₁, 3)⁽¹⁾ W_(2i₁ + 1, 0)⁽¹⁾ i₂ i₁ 5 6 7 8 9 0-15W_(2i₁ + 1, 1)⁽¹⁾ W_(2i₁ + 1, 2)⁽¹⁾ W_(2i₁ + 1, 3)⁽¹⁾W_(2i₁ + 2, 0)⁽¹⁾ W_(2i₁ + 2, 1)⁽¹⁾ i₂ i₁ 10 11 12 13 14 0-15W_(2i₁ + 2, 2)⁽¹⁾ W_(2i₁ + 2, 3)⁽¹⁾ W_(2i₁ + 3, 0)⁽¹⁾W_(2i₁ + 3, 1)⁽¹⁾ W_(2i₁ + 3, 2)⁽¹⁾ i₂ i₁ 15 0-15 W_(2i₁ + 3, 3)⁽¹⁾${{Therein}\mspace{14mu} W_{m,n}^{(1)}} = {\frac{1}{\sqrt{8}}\begin{bmatrix}v_{m} \\{\phi_{n}v_{m}}\end{bmatrix}}$

Table 4 refers to Codebook for 2-layer CSI reporting using antenna ports15 to 22 (the codebook for 2-layer CSI reporting using 8 antenna ports(ports 15 to 22)), namely, Rank 2 codebook for 8 antenna ports in LTE-Asystem.

TABLE 4 i₂ i₁ 0 1 2 3 0-15 W_(2i₁, 2i₁, 0)⁽²⁾ W_(2i₁, 2i₁, 1)⁽²⁾W_(2i₁ + 1, 2i₁ + 1, 0)⁽²⁾ W_(2i₁ + 1, 2i₁ + 1, 1)⁽²⁾ i₂ i₁ 4 5 6 70-15 W_(2i₁ + 2, 2i₁ + 2, 0)⁽²⁾ W_(2i₁ + 2, 2i₁ + 2, 1)⁽²⁾W_(2i₁ + 3, 2i₁ + 3, 0)⁽²⁾ W_(2i₁ + 3, 2i₁ + 3, 1)⁽²⁾ i₂ i₁ 8 9 1011 0-15 W_(2i₁, 2i₁ + 1, 0)⁽²⁾ W_(2i₁, 2i₁ + 1, 1)⁽²⁾W_(2i₁ + 1, 2i₁ + 2, 0)⁽²⁾ W_(2i₁ + 1, 2i₁ + 2, 1)⁽²⁾ i₂ i₁ 12 13 1415 0-15 W_(2i₁, 2i₁ + 3, 0)⁽²⁾ W_(2i₁, 2i₁ + 3, 1)⁽²⁾W_(2i₁ + 1, 2i₁ + 3, 0)⁽²⁾ W_(2i₁ + 1, 2i₁ + 3, 1)⁽²⁾${{Therein}\mspace{14mu} W_{m,m^{\prime},n}^{(2)}} = {\frac{1}{4}\begin{bmatrix}v_{m} & v_{m^{\prime}} \\{\phi_{n}v_{m}} & {{- \phi_{n}}v_{m^{\prime}}}\end{bmatrix}}$

Table 5 refers to Codebook for 3-layer CSI reporting using antenna ports15 to 22 (the codebook for 3-layer CSI reporting using 8 antenna ports(ports 15 to 22)), namely, Rank 3 codebook for 8 antenna ports in LTE-Asystem.

TABLE 5 i₂ i₁ 0 1 2 0-3 W_(8i₁, 8i₁, 8i₁ + 8)⁽³⁾W_(8i₁ + 8, 8i₁, 8i₁ + 8)⁽³⁾${\overset{\sim}{W}}_{{8i_{1}},{{8i_{1}} + 8},{{8i_{1}} + 8}}^{(3)}$i₂ i₁ 3 4 5 0-3${\overset{\sim}{W}}_{{{8i_{1}} + 8},{8i_{1}},{8i_{1}}}^{(3)}$W_(8i₁ + 2, 8i₁ + 2, 4i₁ + 10)⁽³⁾W_(8i₁ + 10, 8i₁ + 2, 8i₁ + 10)⁽³⁾ i₂ i₁ 6 7 8 0-3${\overset{\sim}{W}}_{{{8i_{1}} + 2},{{8i_{1}} + 10},{{8i_{1}} + 10}}^{(3)}$${\overset{\sim}{W}}_{{{8i_{1}} + 10},{{8i_{1}} + 2},{{8i_{1}} + 2}}^{(3)}$W_(8i₁ + 4, 8i₁ + 4, 8i₁ + 12)⁽³⁾ i₂ i₁ 9 10 11 0-3W_(8i₁ + 12, 8i₁ + 4, 8i₁ + 12)⁽³⁾${\overset{\sim}{W}}_{{{8i_{1}} + 4},{{8i_{1}} + 12},{{8i_{1}} + 12}}^{(3)}$${\overset{\sim}{W}}_{{{8i_{1}} + 12},{{8i_{1}} + 4},{{8i_{1}} + 4}}^{(3)}$i₂ i₁ 12 13 14 0-3 W_(8i₁ + 6, 8i₁ + 6, 8i₁ + 14)⁽³⁾W_(8i₁ + 14, 8i₁ + 6, 8i₁ + 14)⁽³⁾${\overset{\sim}{W}}_{{{8i_{1}} + 6},{{8i_{1}} + 14},{{8i_{1}} + 14}}^{(3)}$i₂ i₁ 15 0-3${\overset{\sim}{W}}_{{{8i_{1}} + 14},{{8i_{1}} + 6},{{8i_{1}} + 6}}^{(3)}$$\begin{matrix}{{{{Therein}\mspace{14mu} W_{m,m^{\prime},m^{''}}^{(3)}} = {\frac{1}{\sqrt{24}}\begin{bmatrix}v_{m} & v_{m^{\prime}} & v_{m^{''}} \\v_{m} & {- v_{m^{\prime}}} & {- v_{m^{''}}}\end{bmatrix}}},} \\{{\overset{\sim}{W}}_{m,m^{\prime},m^{''}}^{(3)} = {\frac{1}{\sqrt{24}}\begin{bmatrix}v_{m} & v_{m^{\prime}} & v_{m^{''}} \\v_{m} & v_{m^{\prime}} & {- v_{m^{''}}}\end{bmatrix}}}\end{matrix}\quad$

Table 6 refers to Codebook for 4-layer CSI reporting using antenna ports15 to 22 (the codebook for 4-layer CSI reporting using 8 antenna ports(ports 15 to 22)), namely, Rank 4 codebook for 8 antenna ports in LTE-Asystem.

TABLE 6 i₂ i₁ 0 1 2 0-3 W_(8i₁, 8i₁ + 8, 0)⁽⁴⁾W_(8i₁, 8i₁ + 8, 1)⁽⁴⁾ W_(8i₁ + 2, 8i₁ + 10, 0)⁽⁴⁾ i₂ i₁ 3 4 5 0-3W_(8i₁ + 2, 8i₁ + 10, 1)⁽⁴⁾ W_(8i₁ + 4, 8i₁ + 12, 0)⁽⁴⁾W_(8i₁ + 4, 8i₁ + 12, 1)⁽⁴⁾ i₂ i₁ 6 7 0-3W_(8i₁ + 6, 8i₁ + 14, 0)⁽⁴⁾ W_(8i₁ + 6, 8i₁ + 14, 1)⁽⁴⁾${{Therein}\mspace{14mu} W_{m,m^{\prime},n}^{(4)}} = {\frac{1}{\sqrt{32}}\begin{bmatrix}v_{m} & v_{m^{\prime}} & v_{m} & v_{m^{\prime}} \\{\phi_{n}v_{m}} & {\phi_{n}v_{m^{\prime}}} & {{- \phi_{n}}v_{m}} & {{- \phi_{n}}v_{m^{\prime}}}\end{bmatrix}}$

Table 7 refers to Codebook for 1-layer CSI reporting using antenna ports15 to 22 (the codebook for 5-layer CSI reporting using 8 antenna ports(ports 15 to 22)), namely, Rank 5 codebook for 8 antenna ports in LTE-Asystem.

TABLE 7 i₂ i₁ 0 0-3$W_{i_{1}}^{(5)} = {\frac{1}{\sqrt{40}}\begin{bmatrix}v_{2i_{1}} & v_{2i_{1}} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 16} \\v_{2i_{1}} & {- v_{2i_{1}}} & v_{{2i_{1}} + 8} & {- v_{{2i_{1}} + 8}} & v_{{2i_{1}} + 16}\end{bmatrix}}$

Table 8 refers to Codebook for 1-layer CSI reporting using antenna ports15 to 22 (the codebook for 6-layer CSI reporting using 8 antenna ports(ports 15 to 22)), namely, Rank 6 codebook for 8 antenna ports in LTE-Asystem.

TABLE 8 i₂ i₁ 0 0-3$W_{i_{1}}^{(6)} = {\frac{1}{\sqrt{48}}\begin{bmatrix}v_{2i_{1}} & v_{2i_{1}} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 16} & v_{{2i_{1}} + 16} \\v_{2i_{1}} & {- v_{2i_{1}}} & v_{{2i_{1}} + 8} & {- v_{{2i_{1}} + 8}} & v_{{2i_{1}} + 16} & {- v_{{2i_{1}} + 16}}\end{bmatrix}}$

Table 9 refers to Codebook for 1-layer CSI reporting using antenna ports15 to 22 (the codebook for 7-layer CSI reporting using 8 antenna ports(ports 15 to 22)), namely, Rank 7 codebook for 8 antenna ports in LTE-Asystem.

TABLE 9 i₂  i₁  0 0-3$W_{i_{1}}^{(7)} = {\frac{1}{\sqrt{56}}\begin{bmatrix}v_{2i_{1}} & v_{2i_{1}} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 16} & v_{{2i_{1}} + 16} & v_{{2i_{1}} + 24} \\v_{2i_{1}} & {- v_{2i_{1}}} & v_{{2i_{1}} + 8} & {- v_{{2i_{1}} + 8}} & v_{{2i_{1}} + 16} & {- v_{{2i_{1}} + 16}} & v_{{2i_{1}} + 24}\end{bmatrix}}$

Table 10 refers to Codebook for 1-layer CSI reporting using antennaports 15 to 22 (the codebook for 8-layer CSI reporting using 8 antennaports (ports 15 to 22)), namely, Rank 8 codebook for 8 antenna ports inLTE-A system.

TABLE 10 i₂  i₁  0 0 $\begin{matrix}{W_{i_{1}}^{(8)} =} \\{\frac{1}{8}\begin{bmatrix}v_{2i_{1}} & v_{2i_{1}} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 8} & v_{{2i_{1}} + 16} & v_{{2i_{1}} + 16} & v_{{2i_{1}} + 24} & v_{{2i_{1}} + 24} \\v_{2i_{1}} & {- v_{2i_{1}}} & v_{{2i_{1}} + 8} & {- v_{{2i_{1}} + 8}} & v_{{2i_{1}} + 16} & {- v_{{2i_{1}} + 16}} & v_{{2i_{1}} + 24} & {- v_{{2i_{1}} + 24}}\end{bmatrix}}\end{matrix}\quad$

In the above tables, φ_(n)=e^(jπn/2), ν_(m)=[1 e^(j2πm/32) e^(j4πm/32)e^(j6πm/32)]^(T), therein, (•)^(T) represents matrix transpose.

In the case of no codebook compression, PMI is defined as follows:

For 8 antenna ports and corresponding RI value which is 1, the first PMIvalue i₁ε{0, 1, 2, . . . , 15} shall correspond to the codebook index i₁in Table 3 and the second PMI value i₂ε{0, 1, 2, . . . , 15} shallcorrespond to the codebook index i₂ in Table 3.

For 8 antenna ports and corresponding RI value which is 2, the first PMIvalue i₁ε{0, 1, 2, . . . , 15} shall correspond to the codebook index i₁in Table 4 and the second PMI value i₂ε{0, 1, 2, . . . , 15} shallcorrespond to the codebook index i₂ in Table 4.

For 8 antenna ports and corresponding RI value which is 3, the first PMIvalue i₁ε{0, 1, 2, 3} shall correspond to the codebook index i₁ in Table5 and the second PMI value i₂ε{0, 1, 2, . . . , 15} shall correspond tothe codebook index i₂ in Table 5.

For 8 antenna ports and corresponding RI value which is 4, the first PMIvalue i₁ε{0, 1, 2, 3} shall correspond to the codebook index i₁ in Table6 and the second PMI value i₂ε{0, 1, 2, . . . , 15} shall correspond tothe codebook index i₂ in Table 6.

For 8 antenna ports and corresponding RI value which is 5, the first PMIvalue i₁ε{0, 1, 2, 3} shall correspond to the codebook index i₁ in Table3 and the second PMI value i₂ε{0} shall correspond to the codebook indexi₂ in Table 7.

For 8 antenna ports and corresponding RI value which is 6, the first PMIvalue i₁ε{0, 1, 2, 3} shall correspond to the codebook index i₁ in Table4 and the second PMI value i₂ε{0} shall correspond to the codebook indexi₂ in Table 8.

For 8 antenna ports and corresponding RI value which is 7, the first PMIvalue i₁ε{0, 1, 2, 3} shall correspond to the codebook index i₁ in Table5 and the second PMI value i₂ε{0} shall correspond to the codebook indexi₂ in Table 9.

For 8 antenna ports and corresponding RI value which is 8, the first PMIvalue i₁ε{0} shall correspond to the codebook index i₁ in Table 6 andthe second PMI value i₂ε{0} shall correspond to the codebook index i₂ inTable 10.

LTE-A system supports PUCCH reporting mode 1-1 for 8 antenna ports toachieve the feedback for RI, wideband PMI and wideband CQI. At present,there are two PUCCH reporting mode 1-1, respectively, referred to assubmode 1 and submode 2. In submode 2, RI is reported on an individualsub-frame, the first PMI, the wideband second PMI and the wideband CQIis needed to be reported in a sub-frame; the Uplink Control Information(UCI) domain that first PMI, wideband second PMI and wideband CQI reportmay be shown in Table 11 or Table 12.

TABLE 11 The number of bits 2 antenna ports 4 antenna ports 8 antennaports Domain Rank = 1 Rank = 2 Rank = 1 Rank >1 Rank = 1 Rank >1wideband CQI 4 4 4 4 4 4 Spatial 0 3 0 3 0 3 differencing CQI The firstPMI — — — — TBD TBD value The wideband 2 1 4 4 TBD TBD second PMI value

TABLE 12 The number of bits 2 antenna ports 4 antenna ports 8 antennaports Domain Rank = 1 Rank = 2 Rank = 1 Rank >1 Rank = 1 Rank >1wideband CQI 4 4 4 4 4 4 Spatial differencing 0 3 0 3 0 3 CQI widebandPMI 2 1 4 4 TBD TBD

TBD refers that it is not defined in current standard.

The total number of the bits in the domain cannot exceed 11. For 8antenna ports:

When Rank=1, a total of 8 bits are required for the first PMI value andthe second PMI value in Table 3, and there will be 12 bits in total plus4 bits of wideband CQI, beyond 11 bits.

When Rank=2, a total of 8 bits are required for the first PMI value andthe second PMI value in Table 4, and there will be 15 bits in total plus4 bits of wideband CQI and 3 bits of spatial differencing CQI, beyond 11bits.

When Rank=3, a total of 6 bits are required for the first PMI value andthe second PMI value in Table 5, and there will be 13 bits in total plus4 bits of wideband CQI and 3 bits of spatial differencing CQI, beyond 11bits.

When Rank=4, a total of 5 bits are required for the first PMI value andthe second PMI value in Table 6, and there will be 12 bits in total plus4 bits of wideband CQI and 3 bits of spatial differencing CQI, beyond 11bits.

LTE-A system further supports PUCCH reporting mode 2-1 for 8 antennaports to achieve the feedback for the RI, the wideband first PMI, thewideband second PMI and the feedback for CQI or RI, the wideband secondPMI, wideband CQI, the sub-band second PMI and sub-band CQI based onPrecorder Type Indication (PTI); the uplink control information domainthat wideband PMI and wideband CQI report is shown in Table 13.

TABLE 13 The number of bits 8 antenna ports Rank = 1 Rank = 2, 3 Rank =4 Rank = 5, 6, 7 Rank = 8 Domain PTI = 0 PTI = 1 PTI = 0 PTI = 1 PTI = 0PTI = 1 PTI = 0 PTI = 1 PTI = 0 PTI = 1 wideband 4 0 4 0 4 0 4 0 4 0 CQIsub-band 0 4 0 4 0 4 0 4 0 4 CQI Spatial 0 0 3 3 3 3 3 3 3 3differencing CQI Wideband 4 0 4 0 3 0 0 0 0 0 i2 Sub-band i2 0 4 0 2 0 20 0 0 0 Sub-band 0 1 or 2 0 1 or 2 0 1 or 2 0 1 or 2 0 1 or 2 label

The total number of the bits in the domain cannot exceed 11. For 8antenna ports:

When Rank=2, a total of 4 bits are required for the second PMI value inTable 4, and there will be 13 bits in total plus 4 bits of sub-band CQI,3 bits of spatial differencing CQI and at most 2 bits of sub-bandlocation indicator, beyond 11 bits.

When Rank=3, a total of 4 bits are required for the second PMI value inTable 5, and there will be 13 bits in total plus 4 bits of sub-band CQI,3 bits of spatial differencing CQI and at most 2 bits of sub-bandlocation indicator, beyond 11 bits.

When Rank=4, a total of 3 bits are required for the second PMI value inTable 6, and there will be 12 bits in total plus 4 bits of sub-band CQI,3 bits of spatial differencing CQI and at most 2 bits of sub-bandlocation indicator, beyond 11 bits.

Codebook compression shall be required for all situations mentionedabove; in case of codebook compression, the relationship of the firstPMI value and the wideband second PMI value with the codebook indexes i₁and i₂ shall be redefined. Currently, no relationship definition of thefirst PMI value and the wideband second PMI value with the codebookindexes i₁ and i₂ or that of PMI with the codebook indexes i₁ and i₂after codebook compression is provided.

In the procedure of realizing the objects of the present invention, atleast the following problems existing in the current technologies werefound:

At present, no relationship definition of the first PMI value and thewideband second PMI value with the codebook indexes i₁ and i₂ or that ofPMI with the codebook indexes i₁ and i₂ after codebook compression isprovided.

SUMMARY OF THE PRESENT INVENTION

The embodiments of the present invention put forward the method fortransmitting channel state information and device thereof, so as tosolve the problem of no corresponding relationship definition of thepre-coding matrix indicator information with the codebook index aftercodebook compression provided in the current technologies.

To achieve the above purpose, the embodiments of the present inventionput forward a method for transmitting channel state information, whichcomprising:

receiving, by a terminal equipment, a control signaling sent by basestation, the control signaling informs the terminal equipment thatchannel state information feedback is needed and feedback mode to beused by the channel state information feedback;determining, by the terminal equipment, Rank Indication (RI) value andpre-coding matrix in compressed pre-coding matrix set and determiningthe value of corresponding pre-coding matrix indicator informationaccording to preset corresponding relationship of the pre-coding matrixindicator information with codebook index in source codebook;sending, by the terminal equipment, the determined RI value and thevalue of pre-coding matrix indicator information to the base station asper the feedback mode.

Moreover, the embodiments of the present invention further put forward aterminal equipment, which comprising:

a receiving module, used to receive control signaling sent by basestation, the control signaling informs the terminal equipment thatchannel state information feedback is needed and feedback mode to beused by the channel state information feedback;a setting module, used to set a corresponding relationship of pre-codingmatrix indicator information with codebook index in the source codebook;a determination module, used to determine the RI value and pre-codingmatrixin compressed pre-coding matrix set and determining the value of thecorresponding pre-coding matrix indicator information according to theRI value and the corresponding relationship of the pre-coding matrixindicator information with the codebook index in the source codebook setby the setting module;a sending module, used to send the RI value and the value of pre-codingmatrix indicator information determined by the determination module tothe base station as per the feedback mode informed in the controlsignaling that receiving module receives.

Moreover, the embodiments of the present invention further put forward amethod for transmitting channel state information, which comprising:

sending, by a base station, a control signaling to terminal equipment toinform the terminal equipment that channel state information feedback isneeded and feedback mode to be used by the channel state informationfeedback;receiving, by the base station, RI and pre-coding matrix indicatorinformation that the terminal equipment reports as per the feedbackmode;determining, by the base station, a pre-coding matrix according topreset corresponding relationship of pre-coding matrix indicatorinformation with codebook index in source codebook according to thereceived RI value and value of the pre-coding matrix indicatorinformation.

Moreover, the embodiments of the present invention further provide abase station, which comprising:

a setting module, used to set a corresponding relationship of thepre-coding matrix indicator information with the codebook index in thesource codebook;a sending module, used to send control signaling to terminal equipmentto inform the terminal equipment that channel state information feedbackis needed and feedback mode to be used by the channel state informationfeedback;a receiving module, used to receive RI and pre-coding matrix indicatorinformation that terminal equipment reports as per the feedback modethat the sending module informs;a determination module, used to determine a pre-coding matrix accordingto corresponding relationship of pre-coding matrix indicator informationwith the codebook index in the source codebook that setting module setsaccording to the RI value and the value of pre-coding matrix indicatorinformation that the receiving module receives.

Compared with the present technology, the embodiments of the presentinvention possess the following advantages:

By applying the technical schemes of the embodiment of the presentinvention, in a LTE-A system using PUCCH reporting mode 1-1 submode 2and PUCCH reporting mode 2-1, in a LTE-A system using PUCCH reportingmode 1-1, in a situation where PMI feedback for 8 antenna ports isneeded to be reported in a sub-frame and PUCCH capacity is limited,therefore codebook compression is required, a corresponding relationshipdefinition of the pre-coding matrix indicator information or thepre-coding matrix indicator information pair and the codebook index orthe codebook index pair after codebook compression is provided, thusrealizing the feedback and receiving of channel state informationbetween a base station and terminal equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the flow diagram of the method for transmitting channel stateinformation provided in the embodiment of the present invention at theterminal equipment;

FIG. 2 is the flow diagram of method for transmitting channel stateinformation provided in the embodiment of the present invention at thebase station;

FIG. 3 is the structure diagram of the terminal equipment provided inthe embodiment of the present invention;

FIG. 4 is the structure diagram of the base station provided in theembodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE PRESENT INVENTION

Based on the deficiencies of the current technical schemes referred inthe background of the present invention, the embodiments of the presentinvention provide the channel state information transmission scheme; byapplying this technical scheme, the feedback and receiving of channelstate information between a base station and terminal equipment can berealized in the application scene using PUCCH reporting mode 1-1 submode2 and PUCCH reporting mode 2-1.

As shown in FIG. 1, it refers to the flow diagram of the method fortransmitting channel state information provided in the embodiments ofthe present invention, which comprises the following specific steps:

Step S101, the terminal equipment receives a control signaling sent bybase station.

The control signaling informs the terminal equipment that channel stateinformation feedback is needed and feedback mode to be used by thechannel state information feedback;

As for the application scene applied in the embodiments of the presentinvention, before step S101, the terminal equipment further receives thebroadcast information sent by base station and is informed that currentbase station is configured with 8 antenna ports.

Step S102, the terminal equipment determines the RI value and pre-codingmatrix in the compressed pre-coding matrix set and determines the valueof corresponding pre-coding matrix indicator information according tothe preset corresponding relationship of pre-coding matrix indicatorinformation with the codebook index in the source codebook.

It should be noted that, in actual application scene, the above sourcecodebook refers to the codebook for 8 antenna ports in LTE-A system, tobe specific; similar cases may happen in the later description of theembodiments of the present invention, while such name change will notaffect the scope of the patent protection of the present invention. Inthe meantime, to simplify description, the illustration of the sourcecodebook here shall be referred in the later description of the presentinvention and will not be described.

In actual application scene, the specific implementation of the stepcomprises the following four conditions:

Condition I, when the pre-coding matrix indicator information thatterminal equipment determines specifically comprises the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information, the terminal equipment determines the value ofthe first pre-coding matrix indicator information and the secondpre-coding matrix indicator information according to the RI value andthe preset corresponding relationship of the first pre-coding matrixindicator information and the second pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook.

In actual application scene, depending on RI value, the correspondingrelationship in the condition comprises the following specific types:

(1) When the RI value that terminal equipment determines is 1, the abovecorresponding relationship specifically comprises:

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 15} corresponds to the codebook index 2 inthe Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 15} corresponds to the codebook index i₂in the Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 7} corresponds to the codebook index i₂ inthe Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, when the value of the second pre-coding matrix indicatorinformation is i₂ε{0, 1, 2, 3}, the value of the second pre-codingmatrix indicator information corresponds to the codebook index i₂ in theRank 1 source codebook, and when the value of the second pre-codingmatrix indicator information is i₂ε{4, 5, 6, 7}, the value of the secondpre-coding matrix indicator information corresponds to codebook indexi₂+8 in the Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 7} corresponds to the codebook index i₂+4in the Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₂ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 7} corresponds to the codebook index i₂+8in the Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂ in the Rank1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂ in the Rank1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂+4 in theRank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂+4 in theRank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂+8 in theRank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂+8 in theRank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂+12 in theRank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂+12 in theRank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index i_(1/2)┘ in the Rank 1source codebook, when the value of the second pre-coding matrixindicator information is i₂ε{0, 1}, the value of the second pre-codingmatrix indicator information corresponds to the codebook index 2i₂ inthe Rank 1 source codebook, and when the value of the second pre-codingmatrix indicator information is i₂ε{3, 4}, the value of the secondpre-coding matrix indicator information corresponds to the codebookindex 2i₂+5 in the Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, when the value of the second pre-coding matrix indicatorinformation is i₂ε{0, 1}, the value of the second pre-coding matrixindicator information corresponds to the codebook index 2i₂ in the Rank1 source codebook, and when the value of the second pre-coding matrixindicator information is i₂ε{3, 4}, the value of the second pre-codingmatrix indicator information corresponds to the codebook index 2i₂+5 inthe Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 2i₂ in the Rank1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 8+2i₂ in theRank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₂ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 1 sourcecodebook, when the value of the second pre-coding matrix indicatorinformation is i₂ε{0, 1}, the value of the second pre-coding matrixindicator information corresponds to the codebook index 2i₂ in the Rank1 source codebook, and when the value of the second pre-coding matrixindicator information is i₂ε{2, 3}, the value of the second pre-codingmatrix indicator information corresponds to the codebook index 8+2i₂ inthe Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, when the value of the second pre-coding matrix indicatorinformation is i₂ε{0, 1}, the value of the second pre-coding matrixindicator information corresponds to the codebook index 2i₂ in the Rank1 source codebook, and when the value of the second pre-coding matrixindicator information is i₂ε{2, 3}, the value of the second pre-codingmatrix indicator information corresponds to the codebook index 8+2i₂ inthe Rank 1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 8i₂ in the Rank1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 8i₂ in the Rank1 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation 2=0 corresponds to the codebook index i₂=0 in the Rank 1source codebook;

Therein, └x┘ represents the greatest integer no greater than x.

(2) When the RI value that terminal equipment determines is 2, the abovecorresponding relationship specifically comprises:

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index i₂ in the Rank 2source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index i₂ in the Rank 2source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 4+i₂ in the Rank2 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 4+i₂ in the Rank2 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 4i₂ in the Rank2 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 4i₂ in the Rank2 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂=0 corresponds to the codebook index i₂=0 in the Rank 2source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂=0 corresponds to the codebook index i₂=4 in the Rank 2source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 2i₂ in theRank 2 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index └i₁/2┘ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 5i₂ in the Rank2 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 2 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1} corresponds to the codebook index 5i₂ in the Rank2 source codebook;

Therein, └x┘ represents the greatest integer no greater than x.

(3) When the RI value that terminal equipment determines is 3, the abovecorresponding relationship specifically comprises:

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 4i₂ in theRank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 4i₂+1 inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 4i₂+2 inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 4i₂+3 inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+(i₂ mod2) in the Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+(i₂ mod 2) inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index 2i₂ in the Rank 3source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 2i₂ in the Rank 3 sourcecodebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+3·(i₂mod 2) in the Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+3·(i₂ mod 2) inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index 2i₂+1 in the Rank3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 2i₂+1 in the Rank 3source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index 8└i₂/4┘+i₂ in theRank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 4└i₂/4┘+i₂ in the Rank 3source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index i₂ in theRank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index i₂+4 inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index i₂+8 inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index i₂+12 inthe Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index8·└i₂/2┘+(i₂ mod 2) in the Rank 3 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index8·└i₂/2┘+(i₂ mod 2)+2 in the Rank 3 source codebook;

Therein, └x┘ represents the greatest integer no greater than x and i mod2 represents the remainder of dividing i by 2.

(4) When the RI value that terminal equipment determines is 4, the abovecorresponding relationship specifically comprises:

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 4 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 2i₂ in theRank 4 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₂ in the Rank 4 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index4·└i₂/2┘+3(i₂ mod 2) in the Rank 4 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 4 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 2+i₂ inthe Rank 4 source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 4 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index i₂ in the Rank 4source codebook; or,

The value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 4 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 2 in the Rank 4 sourcecodebook;

Therein, └x┘ represents the greatest integer no greater than x and i mod2 represents the remainder of dividing i by 2.

To be specific, as for PUCCH reporting mode 1-1 submode 2, therelationship is of the value of the first pre-coding matrix indicatorinformation and the value of the second pre-coding matrix indicatorinformation with the codebook indexes i₁ and i₂ can be expressed as:

When the RI is equal to 1, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex 2i₁ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 2i₂ in the Rank 1 source codebook;

When the RI is equal to 2, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex 2i₁ in the Rank 2 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index i₂ in the Rank 2 source codebook;

When the RI is equal to 3, the value of the first pre-coding matrixindicator information i₁ε{0, 1} corresponds to the codebook index 2i₁ inthe Rank 3 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index 4└i₂/4┘+i₂ in the Rank 3 source codebook;

When the RI is equal to 4, the value of the first pre-coding matrixindicator information i₁ε{0, 1} corresponds to the codebook index 2i₁ inthe Rank 4 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index i₂ in the Rank 4 source codebook.

As no codebook compression will be required in the case that RI>4, thecorresponding relationship of the value of the first pre-coding matrixindicator information and the value of the second pre-coding matrixindicator information with the codebook indexes i₁ and i₂ withoutcodebook compression can be applied.

Accordingly, as for PUCCH reporting mode 1-1 submode 2, the relationshipof the first PMI value and the second PMI value with the codebookindexes i₁ and i₂ is shown in Table 14.

TABLE 14 The relationship of the second PMI with the The relationship ofthe codebook index i₂ first PMI with the The Total codebook index i₁second The The first PMI Codebook PMI value Codebook number RI valueI_(PMI1) index i₁ I_(PMI2) index i₂ of bits 1 0-7 2I_(PMI1) 0-12I_(PMI2) 4 2 0-7 2I_(PMI1) 0-1 I_(PMI2) 4 3 0-1 2I_(PMI1) 0-74└I_(PMI2)/4┘ + I_(PMI2) 4 4 0-1 2I_(PMI1) 0-7 I_(PMI2) 4 5 0-3 I_(PMI1)0 0 2 6 0-3 I_(PMI1) 0 0 2 7 0-3 I_(PMI1) 0 0 2 8 0 0 0 0 0

To be specific, as for PUCCH reporting mode 2-1, because the value ofthe first pre-coding matrix indicator information does not requirecodebook compression, the relationship of the value of the firstpre-coding matrix indicator information with the codebook index i₁without codebook compression is applied; the relationship of the valueof the second pre-coding matrix indicator information with the codebookindex i₂ can be expressed as:

When the RI is equal to 2, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 15} corresponds to the codebookindex i₁ in the Rank 2 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1, 2, 3} corresponds tothe codebook index 2i₁ in the Rank 2 source codebook;

When the RI is equal to 3, the value of the first pre-coding matrixindicator information i₁ε{0, 1, 2, 3} corresponds to the codebook index4 in the Rank 3 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, 2, 3} corresponds to the codebookindex 8·└i₂/2┘+(i₂ mod 2)+2 in the Rank 3 source codebook;

When the RI is equal to 4, the value of the first pre-coding matrixindicator information i₁ε{0, 1, 2, 3} corresponds to the codebook indexi₁ in the Rank 4 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, 2, 3} corresponds to the codebookindex 2i₂ in the Rank 4 source codebook;

As no codebook compression will be required in the case that RI=1 andRI>4, the corresponding relationship of the value of the firstpre-coding matrix indicator information and the value of the secondpre-coding matrix indicator information with the codebook indexes i₁ andi₂ without codebook compression can be applied.

Accordingly, as for PUCCH reporting mode 2-1, the relationship of thesecond PMI value with the codebook index i₂ is shown in Table 15.

TABLE 15 The relationship of the second PMI with the codebook index i₂The second PMI RI value I_(PMI2) Codebook index i₂ 1  0-15 I_(PMI2) 20-3 2I_(PMI2) 3 0-3 8 · └I_(PMI2)/2┘ + (I_(PMI2) mod2) + 2 4 0-32I_(PMI2) 5 0 0 6 0 0 7 0 0 8 0 0

Condition II, when the pre-coding matrix indicator information to bedetermined by the terminal equipment specifically refers to a piece ofpre-coding matrix indicator information, the terminal equipmentdetermines the value of the pre-coding matrix indicator informationaccording to the RI value and the preset corresponding relationship ofthe pre-coding matrix indicator information with the codebook index pair(i₁, i₂) composed of the two codebook indexes in the source codebook.

To be specific, when the RI value that terminal equipment determines is1, the corresponding relationship in the present condition comprises:

The value of the pre-coding matrix indicator information iε{0, 1, . . ., 15} corresponds to the codebook index pair (i₁, i₂) in the Rank 1source codebook, therein, i₁=i and i₂=2·(i mod 2); or,

The value of the pre-coding matrix indicator information iε{0, 1, . . ., 15} corresponds to the codebook index pair (i₁, i₂) in the Rank 1source codebook, therein, i₁=i and i₂=8+2·(i mod 2); or,

The value of the pre-coding matrix indicator information iε{0, 1, . . ., 15} corresponds to the codebook index pair (i₁, i₂) in the Rank 1source codebook, therein, i₁=i and i₂=i mod 4; or,

The value of the pre-coding matrix indicator information iε{0, 1, . . ., 15} corresponds to the codebook index pair (i₁, i₂) in the Rank 1source codebook, therein, i₁=i and i₂=8+2·(i mod 4);

Therein, i mod 2 represents the remainder of dividing i by 2 and i mod 4represents the remainder of dividing i by 4.

Condition III, when the pre-coding matrix indicator information to bedetermined by the terminal equipment specifically comprises the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information, the terminal equipment determines the value ofthe first pre-coding matrix indicator information and the secondpre-coding matrix indicator information according to the RI value andthe preset corresponding relationship of the pre-coding matrix indicatorinformation pair composed of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe codebook index pair (i₁, i₂) composed of the two codebook indexes inthe source codebook.

Condition IV, when the pre-coding matrix indicator information to bedetermined by the terminal equipment specifically refers to a piece ofpre-coding matrix indicator information, the terminal equipmentdetermines the value of the pre-coding matrix indicator informationaccording to the RI value and the preset corresponding relationship ofthe pre-coding matrix indicator information and the two codebook indexesi₁ and i₂ in the source codebook.

There is no need to enumerate specific corresponding relationship rulesfor condition III and condition IV; all the rules determined in linewith above corresponding relationship belong to the scope of the patentprotection of the present invention.

It should be noted that, various corresponding relationships mentionedabove refer to the description of the corresponding relationship to beapplied depending on the RI value. In specific application scene, one ormore of the above corresponding relationships can be optionally selectedfor combination; the adjustment on the technical schemes due toselection difference will not affect the scope of the patent protectionof the present invention.

Step S103, the terminal equipment sends the determined RI value and thevalue of pre-coding matrix indicator information as per the feedbackmode to the base station.

The above procedure is the implementation process of the method fortransmitting channel state information provided in the embodiments ofthe present invention at the terminal equipment. The embodiment of thepresent invention further provides the implementation process of thechannel state information receiving method at the base station below;the flow diagram is shown in FIG. 2, which comprises the followingspecific steps:

Step S201, a base station sends a control signaling to the terminalequipment to inform the terminal equipment that channel stateinformation feedback is needed and feedback mode to be used by thechannel state information feedback.

Step S202, the base station receives the RI and pre-coding matrixindicator information that terminal equipment reports as per thefeedback mode.

Step S203, the base station determines a pre-coding matrix according tothe preset corresponding relationship of the pre-coding matrix indicatorinformation with the codebook index in the source codebook according tothe received RI value and the value of pre-coding matrix indicatorinformation.

In actual application scene, corresponding to the above-mentioned stepS102, the specific implementation process of this step comprises thefollowing four conditions:

Condition I, when the pre-coding matrix indicator information reportedby the terminal equipment that base station receives specificallycomprises the first pre-coding matrix indicator information and thesecond pre-coding matrix indicator information, the base stationdetermines a pre-coding matrix according to the RI value and the presetcorresponding relationship of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe two codebook indexes i₁ and i₂ in the source codebook.

When the RI value is 1, the base station determines a pre-coding matrixaccording to the value of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information; thecorresponding relationship based on is consistent with (1) in theCondition I of the description of the corresponding relationship in theabove-mentioned step S102.

When the RI value is 2, the base station determines a pre-coding matrixaccording to the value of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information; thecorresponding relationship based on is consistent with (2) in theCondition I of the description of the corresponding relationship in theabove-mentioned step S102.

When the RI value is 3, the base station determines a pre-coding matrixaccording to the value of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information; thecorresponding relationship based on is consistent with (3) in theCondition I of the description of the corresponding relationship in theabove-mentioned step S102.

When the RI value is 4, the base station determines a pre-coding matrixaccording to the value of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information; thecorresponding relationship based on is consistent with (4) in theCondition I of the description of the corresponding relationship in theabove-mentioned step S102.

Condition II, when the pre-coding matrix indicator information reportedby the terminal equipment that base station receives specifically refersto a piece of pre-coding matrix indicator information, the base stationdetermines a pre-coding matrix according to the RI value and the presetcorresponding relationship of the pre-coding matrix indicatorinformation with the codebook index pair (i₁, i₂) composed of the twocodebook indexes in the source codebook.

When the RI value is 1, the base station determines a pre-coding matrixaccording to the value of the pre-coding matrix indicator information;the corresponding relationship based on is consistent with the ConditionII of the description of the corresponding relationship in theabove-mentioned step S102.

Condition III, when the pre-coding matrix indicator information reportedby the terminal equipment that base station receives specificallycomprises the pre-coding matrix indicator information pair composed ofthe first pre-coding matrix indicator information and the secondpre-coding matrix indicator information, the base station determines apre-coding matrix according to the RI value and the preset correspondingrelationship of the pre-coding matrix indicator information paircomposed of the first pre-coding matrix indicator information and thesecond pre-coding matrix indicator information with the codebook indexpair (i₁, i₂) composed of the two codebook indexes in the sourcecodebook.

Condition IV, when the pre-coding matrix indicator information reportedby the terminal equipment that base station receives specifically refersto a pre-coding matrix, the base station determines a pre-coding matrixaccording to the RI value and the preset corresponding relationship ofthe pre-coding matrix indicator information with the two codebookindexes i₁ and i₂ in the source codebook.

Similarly, various corresponding relationships in the above conditionswill not be enumerated; all the rules determined in line with the abovecorresponding relationship belong to the scope of the patent protectionof the present invention.

It should be noted that, various corresponding relationships mentionedabove refer to the description of the corresponding relationship to beapplied depending on the RI value. In specific application scene, one ormore of the above corresponding relationships can be optionally selectedfor combination; the adjustment on the technical schemes due toselection difference will not affect the scope of the patent protectionof the present invention.

Compared with the present technology, the embodiments of the presentinvention possess the following advantages

By applying the technical schemes of the embodiment of the presentinvention, in a LTE-A system using PUCCH reporting mode 1-1 submode 2and PUCCH reporting mode 2-1, in a situation where PMI feedback for 8antenna ports is needed to be reported in a sub-frame and PUCCH capacityis limited, therefore codebook compression, a corresponding relationshipdefinition of the pre-coding matrix indicator information or thepre-coding matrix indicator information pair and the codebook index orthe codebook index pair after code book compression is provided, thusrealizing the feedback and receiving of channel state informationbetween a base station and terminal equipment.

In order to implement the technical schemes of the embodiments of thepresent invention, the embodiments of the present invention further putforward the terminal equipment; the structure diagram thereof is shownin FIG. 3, which specifically comprises:

A receiving module 31 for receiving the control signaling sent by basestation, the control signaling informs the terminal equipment thatchannel state information feedback is needed and feedback mode to beused by the channel state information feedback;

A setting module 32 for setting a corresponding relationship ofpre-coding matrix indicator information with the codebook index in thesource codebook;

A determination module 33 for determining the RI value and pre-codingmatrix in the compressed pre-coding matrix set and determining the valueof the corresponding pre-coding matrix indicator information accordingto the RI value and the corresponding relationship of pre-coding matrixindicator information with the codebook index in the source codebook setby the setting module 32;

A sending module 34 for sending the RI value and the value of pre-codingmatrix indicator information determined by the determination module 33to the base station as per the feedback mode informed in the controlsignaling that receiving module 31 receives.

In specific application scene, the determination module 33 is used for:

determine the RI value and pre-coding matrix in the compressedpre-coding matrix set, and determining the value of the first pre-codingmatrix indicator information and the second pre-coding matrix indicatorinformation according to the RI value and the corresponding relationshipof the first pre-coding matrix indicator information and the secondpre-coding matrix indicator information with the two codebook indexes i₁and i₂ in the source codebook set by the setting module 32 when thepre-coding matrix indicator information to be determined specificallycomprises the first pre-coding matrix indicator information and thesecond pre-coding matrix indicator information; or,determine the RI value and pre-coding matrix in the compressedpre-coding matrix set, and determining the value of the pre-codingmatrix indicator information according to the RI value and thecorresponding relationship of the pre-coding matrix indicatorinformation with the codebook index pair (i₁, i₂) composed of the twocodebook indexes in the source codebook set by the setting module 32when the pre-coding matrix indicator information to be determinedspecifically refers to a piece of pre-coding matrix indicatorinformation; or,determine the RI value and pre-coding matrix in the compressedpre-coding matrix set, and determining the value of the first pre-codingmatrix indicator information and the second pre-coding matrix indicatorinformation according to the RI value and the corresponding relationshipof the pre-coding matrix indicator information pair composed of thefirst pre-coding matrix indicator information and the second pre-codingmatrix indicator information with the codebook index pair (i₁, i₂)composed of the two codebook indexes in the source codebook set by thesetting module 32 when the pre-coding matrix indicator information to bedetermined specifically comprises the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information; or,determine the RI value and pre-coding matrix in the compressedpre-coding matrix set, and determining the value of the pre-codingmatrix indicator information according to the RI value and thecorresponding relationship of the pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook set by the setting module 32 when the pre-coding matrixindicator information to be determined specifically refers to a piece ofpre-coding matrix indicator information.

Moreover, the embodiments of the present invention further provide thebase station; the structure diagram thereof is shown in FIG. 4, whichcomprises:

A setting module 41 for setting a corresponding relationship ofpre-coding matrix indicator information with the codebook index in thesource codebook;

A sending module 42 for sending control signaling to terminal equipmentto inform the terminal equipment that channel state information feedbackis needed and feedback mode to be used by the channel state informationfeedback;

A receiving module 43 for receiving the RI value and the value ofpre-coding matrix indicator information that terminal equipment reportsas per the feedback mode that sending module 42 informs;

A determination module 44 for determining a pre-coding matrix as per thecorresponding relationship of pre-coding matrix indicator informationwith the codebook index in the source codebook that setting module 41sets according to the RI value and the value of pre-coding matrixindicator information that receiving module 43 receives.

In specific application scene, the determination module 44 is used for:determine a pre-coding matrix according to the RI value and thecorresponding relationship of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe two codebook indexes i₁ and i₂ in the source codebook set by thesetting module 41 when the pre-coding matrix indicator informationreported by the terminal equipment that receiving module 43 receivesspecifically comprises the first pre-coding matrix indicator informationand the second pre-coding matrix indicator information; or,

determine a pre-coding matrix according to the RI value and thecorresponding relationship of the pre-coding matrix indicatorinformation with the codebook index pair (i₁, i₂) composed of the twocodebook indexes in the source codebook set by the setting module 41when the pre-coding matrix indicator information reported by theterminal equipment that receiving module 43 receives specifically refersto a piece of pre-coding matrix indicator information; or,determine a pre-coding matrix according to the RI value and thecorresponding relationship of the pre-coding matrix indicatorinformation pair composed of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe codebook index pair (i₁, i₂) composed of the two codebook indexes inthe source codebook set by the setting module 41 when the pre-codingmatrix indicator information reported by the terminal equipment thatreceiving module 43 receives specifically comprises the pre-codingmatrix indicator information pair composed of the first pre-codingmatrix indicator information and the second pre-coding matrix indicatorinformation; or,determine a pre-coding matrix according to the RI value and thecorresponding relationship of the pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook set by the setting module 41 when the pre-coding matrixindicator information reported by the terminal equipment that receivingmodule 43 receives specifically refers to a pre-coding matrix.

Compared with the present technology, the embodiments of the presentinvention possess the following advantages:

By applying the technical schemes of the embodiment of the presentinvention, in a LTE-A system using PUCCH reporting mode 1-1 submode 2and PUCCH reporting mode 2-1 feedback mode, in a situation where PMIfeedback for 8 antenna ports is needed to be reported in a sub-frame andPUCCH capacity is limited, therefore codebook compression, acorresponding relationship definition of the pre-coding matrix indicatorinformation or the pre-coding matrix indicator information pair and thecodebook index or the codebook index pair after code book compression isprovided, thus realizing the feedback and receiving of channel stateinformation between a base station and terminal equipment.

Through the description of the embodiments above, the technicalpersonnel in this field can understand clearly that the embodiments ofthe present invention can be implemented by hardware or software andnecessary general hardware platform. Based on this understanding, thetechnical program of the embodiments of the present invention can beembodied by a form of software products essentially which can be storedin a nonvolatile storage medium (such as CD-ROM, USB flash disk, mobilehard disk drive, etc.), including a number of instructions for making acomputer device (such as personal computers, servers, or networkequipments, etc.) implement the methods described in the embodiments ofthe present invention.

The technical personnel in this field can be understood that theillustration is only schematic drawings of a preferred embodiment, andthe module or process is not necessary for the implementation of theembodiments of the present invention.

The technical personnel in this field can be understood that the modulescan be distributed in device of the embodiments according to thedescription of the embodiments above, and also can be varied in one ormultiply device of the embodiments. The modules of the embodiments canbe combined into a module, and also can be further split into severalsub-modules.

The number of the embodiments is only to describe, it does not representthe pros and cons of the embodiments.

The descriptions above are just preferred implements ways of theembodiments of the present invention. It should be pointed that, forgeneral technical personnel in this field, some improvement anddecorating can be done, which should be as the protection scope of theembodiments of the present invention.

1. A method for transmitting channel state information, wherein,comprising: receiving, by a terminal equipment, a control signaling sentby base station, the control signaling informs the terminal equipmentthat channel state information feedback is needed and feedback mode tobe used by the channel state information feedback; determining, by theterminal equipment, Rank Indication (RI) value and pre-coding matrix incompressed pre-coding matrix set and determining the value ofcorresponding pre-coding matrix indicator information according topreset corresponding relationship of the pre-coding matrix indicatorinformation with codebook index in source codebook; sending, by theterminal equipment, the determined RI value and the value of pre-codingmatrix indicator information to the base station as per the feedbackmode.
 2. The method of claim 1, wherein, determining, by the terminalequipment, Rank Indication (RI) value and pre-coding matrix incompressed pre-coding matrix set and determining the value ofcorresponding pre-coding matrix indicator information according topreset corresponding relationship of the pre-coding matrix indicatorinformation with codebook index in source codebook, specificallycomprises: when the pre-coding matrix indicator information to bedetermined by the terminal equipment specifically comprises the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information, the terminal equipment determines the value ofthe first pre-coding matrix indicator information and the secondpre-coding matrix indicator information according to the RI value andpreset corresponding relationship of the first pre-coding matrixindicator information and the second pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook; or, when the pre-coding matrix indicator information to bedetermined by the terminal equipment specifically refers to a piece ofpre-coding matrix indicator information, the terminal equipmentdetermines the value of the pre-coding matrix indicator informationaccording to the RI value and the preset corresponding relationship ofthe pre-coding matrix indicator information with the codebook index pair(i₁, i₂) composed of the two codebook indexes in the source codebook;or, when the pre-coding matrix indicator information to be determined bythe terminal equipment specifically comprises the first pre-codingmatrix indicator information and the second pre-coding matrix indicatorinformation, the terminal equipment determines the value of the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information according to the RI value and the presetcorresponding relationship of the pre-coding matrix indicatorinformation pair composed of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe codebook index pair (i₁, i₂) composed of the two codebook indexes inthe source codebook; or, when the pre-coding matrix indicatorinformation to be determined by the terminal equipment specificallyrefers to a piece of pre-coding matrix indicator information, theterminal equipment determines the value of the pre-coding matrixindicator information according to the RI value and the presetcorresponding relationship of the pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook.
 3. The method of claim 2, wherein, when the RI value thatterminal equipment determines is 1, the preset correspondingrelationship of the first pre-coding matrix indicator information andthe second pre-coding matrix indicator information with the two codebookindexes i₁ and i₂ in the source codebook, which used by the terminalequipment to determine the value of the first pre-coding matrixindicator information and the second pre-coding matrix indicatorinformation, specifically comprises: the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 7} corresponds to thecodebook index └i₁/2┘ in the Rank 1 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1, . . . , 15}corresponds to the codebook index i₂ in the Rank 1 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 15} corresponds to the codebook index i₂in the Rank 1 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 15} corresponds to thecodebook index i₁ in the Rank 1 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index i₂ in the Rank 1 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, when the value of the second pre-coding matrix indicatorinformation is i₂ε{0, 1, 2, 3}, the value of the second pre-codingmatrix indicator information corresponds to the codebook index i₂ in theRank 1 source codebook and when the value of the second pre-codingmatrix indicator information is i₂ε{4, 5, 6, 7}, the value of the secondpre-coding matrix indicator information corresponds to codebook indexi₂+8 in the Rank 1 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1, . . . , 15}corresponds to the codebook index i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index i₂+4 in the Rank 1source codebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 15} corresponds to the codebook index i₁in the Rank 1 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index i₂+8 in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index └i₁/2┘ in the Rank 1 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1} corresponds to the codebook index 2i₂ in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index 2i₁in the Rank 1 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1} corresponds to the codebook index2i₂ in the Rank 1 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 7} corresponds to thecodebook index └i₁/2┘ in the Rank 1 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1} correspondsto the codebook index 2i₂+4 in the Rank 1 source codebook; or, the valueof the first pre-coding matrix indicator information i₁ε{0, 1, . . . ,7} corresponds to the codebook index 2i₁ in the Rank 1 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1} corresponds to the codebook index 2i₂+4 in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 2i₂+8 in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 2i₂+8 in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 2i₂+12 in the Rank 1 source codebook; or, the value ofthe first pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 2i₂+12 in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, when the value of the secondpre-coding matrix indicator information is i₂ε{0, 1}, the value of thesecond pre-coding matrix indicator information corresponds to thecodebook index 2i₂ in the Rank 1 source codebook, and when the value ofthe second pre-coding matrix indicator information is i₂ε{3, 4}, thevalue of the second pre-coding matrix indicator information correspondsto the codebook index 2i₂+5 in the Rank 1 source codebook; or, the valueof the first pre-coding matrix indicator information i₁ε{0, 1, . . . ,7} corresponds to the codebook index 2i₁ in the Rank 1 source codebook,when the value of the second pre-coding matrix indicator information isi₂ε{0, 1}, the value of the second pre-coding matrix indicatorinformation corresponds to the codebook index 2i₂ in the Rank 1 sourcecodebook, and when the value of the second pre-coding matrix indicatorinformation is i₂ε{3, 4}, the value of the second pre-coding matrixindicator information corresponds to the codebook index 2i₂+5 in theRank 1 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 15} corresponds to the codebookindex i₁ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 2i₂ in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 15}corresponds to the codebook index i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 8+2i₂ in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, when the value of the secondpre-coding matrix indicator information is i₂ε{0, 1}, the value of thesecond pre-coding matrix indicator information corresponds to thecodebook index 2i₂ in the Rank 1 source codebook, and when the value ofthe second pre-coding matrix indicator information is i₂ε{2, 3}, thevalue of the second pre-coding matrix indicator information correspondsto the codebook index 8+2i₂ in the Rank 1 source codebook; or, the valueof the first pre-coding matrix indicator information i₁ε{0, 1, . . . ,7} corresponds to the codebook index 2i₁ in the Rank 1 source codebook,when the value of the second pre-coding matrix indicator information isi₂ε{0, 1}, the value of the second pre-coding matrix indicatorinformation corresponds to the codebook index 2i₂ in the Rank 1 sourcecodebook, and when the value of the second pre-coding matrix indicatorinformation is i₂ε{2, 3}, the value of the second pre-coding matrixindicator information corresponds to the codebook index 8+2i₂ in theRank 1 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex └i₁/2┘ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 8i₂ in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 8i₂ in the Rank 1 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1, . . . , 15} corresponds to the codebook index 4 in the Rank 1source codebook, and the value of the second pre-coding matrix indicatorinformation i₂=0 corresponds to the codebook index i₂=0 in the Rank 1source codebook; therein, └x┘ represents the greatest integer no greaterthan x.
 4. The method of claim 2, wherein, when the RI value thatterminal equipment determines is 2, the preset correspondingrelationship of the first pre-coding matrix indicator information andthe second pre-coding matrix indicator information with the two codebookindexes i₁ and i₂ in the source codebook, which used by the terminalequipment to determine the value of the first pre-coding matrixindicator information and the second pre-coding matrix indicatorinformation, specifically comprises: the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 7} corresponds to thecodebook index └i₁/2┘ in the Rank 2 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1} correspondsto the codebook index i₂ in the Rank 2 source codebook; or, the value ofthe first pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 2 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index i₂ in the Rank 2 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1, . . . , 7} corresponds to the codebook index └i₁/2┘ in theRank 2 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1} corresponds to the codebook index 4+i₂in the Rank 2 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 7} corresponds to thecodebook index 2i₁ in the Rank 2 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1} corresponds tothe codebook index 4+i₂ in the Rank 2 source codebook; or, the value ofthe first pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index └i₁/2┘ in the Rank 2 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1} corresponds to the codebook index 4i₂ in the Rank 2 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index 2i₁in the Rank 2 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1} corresponds to the codebook index4i₂ in the Rank 2 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 15} corresponds to thecodebook index i₁ in the Rank 2 source codebook, and the value of thesecond pre-coding matrix indicator information i₂=0 corresponds to thecodebook index i₂=0 in the Rank 2 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 15}corresponds to the codebook index i₁ in the Rank 2 source codebook, andthe value of the second pre-coding matrix indicator information i₂=0corresponds to the codebook index i₂=4 in the Rank 2 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1, . . . , 15} corresponds to the codebook index i₁ in the Rank 2source codebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 2i₂ in theRank 2 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex └i₁/2┘ in the Rank 2 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 5i₂ in the Rank 2 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 2 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 5i₂ in the Rank 2 source codebook;therein, └x┘ represents the greatest integer no greater than x.
 5. Themethod of claim 2, wherein, when the RI value that terminal equipmentdetermines is 3, the preset corresponding relationship of the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information with the two codebook indexes i₁ and i₂ in thesource codebook, which used by the terminal equipment to determine thevalue of the first pre-coding matrix indicator information and thesecond pre-coding matrix indicator information, specifically comprises:the value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 4i₂ in theRank 3 source codebook; or, the value of the first pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook indexi₁ in the Rank 3 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, 2, 3} corresponds to the codebookindex 4i₂+1 in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1, 2, 3} corresponds tothe codebook index i₁ in the Rank 3 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1, 2, 3}corresponds to the codebook index 4i₂+2 in the Rank 3 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in the Rank 3source codebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 4i₂+3 inthe Rank 3 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1} corresponds to the codebook index └i₁/2┘in the Rank 3 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index 4·└i₂/2┘+(i₂ mod 2) in the Rank 3 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+(i₂ mod 2) inthe Rank 3 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1} corresponds to the codebook index └i₁/2┘in the Rank 3 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index 2i₂ in the Rank 3 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1} corresponds tothe codebook index 2i₁ in the Rank 3 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 2i₂ in the Rank 3 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+3·(i₂mod 2) in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1} corresponds to thecodebook index 2i₁ in the Rank 3 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 4·└i₂/2┘+3·(i₂ mod 2) in the Rank 3source codebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1} corresponds to the codebook index └i₁/2┘ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, . . . , 7} corresponds to the codebookindex 2i₂+1 in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1} corresponds to thecodebook index 2i₁ in the Rank 3 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 2i₂+1 in the Rank 3 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1} corresponds to the codebook index └i₁/2┘ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 7} corresponds to the codebook index8└i₂/4┘+i₂ in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1} corresponds to thecodebook index 2i₁ in the Rank 3 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 4└i₂/4┘+i₂ in the Rank 3 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook indexi₂ in the Rank 3 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, 2, 3} corresponds to the codebookindex 4 in the Rank 3 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1, 2, 3} corresponds tothe codebook index i₂+4 in the Rank 3 source codebook; or, the value ofthe first pre-coding matrix indicator information i₁ε{0, 1, 2, 3}corresponds to the codebook index i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, 2, 3} corresponds to the codebook index i₂+8 in the Rank 3 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook indexi₂+12 in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1, 2, 3} corresponds tothe codebook index i₁ in the Rank 3 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1, 2, 3}corresponds to the codebook index 8·└i₂/2┘+(i₂ mod 2) in the Rank 3source codebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook index8·└i₂/2┘+(i₂ mod 2)+2 in the Rank 3 source codebook; therein, └x┘represents the greatest integer no greater than x and i mod 2 representsthe remainder of dividing i by
 2. 6. The method according claim 2,wherein, when the RI value that terminal equipment determines is 4, thepreset corresponding relationship of the first pre-coding matrixindicator information and the second pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook, which used by the terminal equipment to determine the value ofthe first pre-coding matrix indicator information and the secondpre-coding matrix indicator information, specifically comprises: thevalue of the first pre-coding matrix indicator information i₁ε{0, 1, 2,3} corresponds to the codebook index i₁ in the Rank 4 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, 2, 3} corresponds to the codebook index 2i₂ in the Rank 4source codebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 4 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook index4·└i₁/2┘+3(i₂ mod 2) in the Rank 4 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, 2, 3}corresponds to the codebook index i₁ in the Rank 4 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, 2, 3} corresponds to the codebook index 2+i₂ in the Rank 4 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1} corresponds to the codebook index └i₁/2┘ in theRank 4 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, . . . , 7} corresponds to the codebookindex i₂ in the Rank 4 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1} corresponds to thecodebook index 2i₁ in the Rank 4 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index i₂ in the Rank 4 source codebook;therein, └x┘ represents the greatest integer no greater than x and i mod2 represents the remainder of dividing i by
 2. 7. The method of claim 2,wherein, when the RI value that terminal equipment determines is 1, thepreset corresponding relationship of the first pre-coding matrixindicator information and the second pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook, which used by the terminal equipment to determine the value ofthe pre-coding matrix indicator information, specifically comprises: thevalue of the pre-coding matrix indicator information iε{0, 1, . . . ,15} corresponds to the codebook index pair (i₁, i₂) in the Rank 1 sourcecodebook, therein, i₁=i and i₂=2·(i mod 2); or, the value of thepre-coding matrix indicator information iε{0, 1, . . . , 15} correspondsto the codebook index pair (i₁, i₂) in the Rank 1 source codebook,therein, i₁=i and i₂=8+2·(i mod 2); or, the value of the pre-codingmatrix indicator information iε{0, 1, . . . , 15} corresponds to thecodebook index pair (i₁, i₂) in the Rank 1 source codebook, therein,i₁=i and i₂=i mod 4; or, the value of the pre-coding matrix indicatorinformation iε{0, 1, . . . , 15} corresponds to the codebook index pair(i₁, i₂) in the Rank 1 source codebook, therein, i₁=i and i₂=8+2 (i mod4); therein, i mod 2 represents the remainder of dividing i by 2 and imod 4 represents the remainder of dividing i by
 4. 8. The method ofclaim 1, wherein, the source codebook, specifically refers to: codebookfor 8 antenna ports in LTE-A system.
 9. A terminal equipment, wherein,comprising: a receiving module, used to receive control signaling sentby base station, the control signaling informs the terminal equipmentthat channel state information feedback is needed and feedback mode tobe used by the channel state information feedback; a setting module,used to set a corresponding relationship of pre-coding matrix indicatorinformation with codebook index in the source codebook; a determinationmodule, used to determine the RI value and pre-coding matrix incompressed pre-coding matrix set and determining the value of thecorresponding pre-coding matrix indicator information according to theRI value and the corresponding relationship of the pre-coding matrixindicator information with the codebook index in the source codebook setby the setting module; a sending module, used to send the RI value andthe value of pre-coding matrix indicator information determined by thedetermination module to the base station as per the feedback modeinformed in the control signaling that receiving module receives. 10.The terminal equipment of claim 9, wherein, the determination module,specifically used to: determine the RI value and pre-coding matrix inthe compressed pre-coding matrix set, and determining the value of thefirst pre-coding matrix indicator information and the second pre-codingmatrix indicator information according to the RI value and thecorresponding relationship of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe two codebook indexes i₁ and i₂ in the source codebook set by thesetting module when the pre-coding matrix indicator information to bedetermined specifically comprises the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information; or,determine the RI value and pre-coding matrix in the compressedpre-coding matrix set, and determining the value of the pre-codingmatrix indicator information according to the RI value and thecorresponding relationship of the pre-coding matrix indicatorinformation with the codebook index pair (i₁, i₂) composed of the twocodebook indexes in the source codebook set by the setting module whenthe pre-coding matrix indicator information to be determinedspecifically refers to a piece of pre-coding matrix indicatorinformation; or, determine the RI value and pre-coding matrix in thecompressed pre-coding matrix set, and determining the value of the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information according to the RI value and the correspondingrelationship of the pre-coding matrix indicator information paircomposed of the first pre-coding matrix indicator information and thesecond pre-coding matrix indicator information with the codebook indexpair (i₁, i₂) composed of the two codebook indexes in the sourcecodebook set by the setting module when the pre-coding matrix indicatorinformation to be determined specifically comprises the first pre-codingmatrix indicator information and the second pre-coding matrix indicatorinformation; or, determine the RI value and pre-coding matrix in thecompressed pre-coding matrix set, and determining the value of thepre-coding matrix indicator information according to the RI value andthe corresponding relationship of the pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook set by the setting module when the pre-coding matrix indicatorinformation to be determined specifically refers to a piece ofpre-coding matrix indicator information.
 11. (canceled)
 12. A method fortransmitting channel state information, wherein, comprising: sending, bya base station, a control signaling to terminal equipment to inform theterminal equipment that channel state information feedback is needed andfeedback mode to be used by the channel state information feedback;receiving, by the base station, RI and pre-coding matrix indicatorinformation that the terminal equipment reports as per the feedbackmode; determining, by the base station, a pre-coding matrix according topreset corresponding relationship of pre-coding matrix indicatorinformation with codebook index in source codebook according to thereceived RI value and value of the pre-coding matrix indicatorinformation.
 13. The method of claim 12, wherein, determining, by thebase station, a pre-coding matrix according to preset correspondingrelationship of pre-coding matrix indicator information with codebookindex in source codebook according to the received RI value and value ofthe pre-coding matrix indicator information, specifically comprises:when the pre-coding matrix indicator information reported by theterminal equipment that base station receives specifically comprises thefirst pre-coding matrix indicator information and the second pre-codingmatrix indicator information, the base station determines a pre-codingmatrix according to the RI value and the preset correspondingrelationship of the first pre-coding matrix indicator information andthe second pre-coding matrix indicator information with the two codebookindexes i₁ and i₂ in the source codebook; or, when the pre-coding matrixindicator information reported by the terminal equipment that basestation receives specifically refers to a piece of pre-coding matrixindicator information, the base station determines a pre-coding matrixaccording to the RI value and the preset corresponding relationship ofthe pre-coding matrix indicator information with the codebook index pair(i₁, i₂) composed of the two codebook indexes in the source codebook;or, when the pre-coding matrix indicator information reported by theterminal equipment that base station receives specifically comprises apre-coding matrix indicator information pair composed of the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information, the base station determines a pre-coding matrixaccording to the RI value and the preset corresponding relationship ofthe pre-coding matrix indicator information pair composed of the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information with the codebook index pair (i₁, i₂) composed ofthe two codebook indexes in the source codebook; or, when the pre-codingmatrix indicator information reported by the terminal equipment thatbase station receives specifically refers to a pre-coding matrix, thebase station determines a pre-coding matrix according to the RI valueand the preset corresponding relationship of the pre-coding matrixindicator information with the two codebook indexes i₁ and i₂ in thesource codebook.
 14. The method of claim 13, wherein, when the RI valuereported by the terminal equipment that base station receives is 1, thepreset corresponding relationship of the first pre-coding matrixindicator information and the second pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook, which is used by the base station to determine the pre-codingmatrix, specifically comprises: the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex └i₁/2┘ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1, . . . , 15}corresponds to the codebook index i₂ in the Rank 1 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 7} corresponds to the codebook index 2i₁ in the Rank 1 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 15} corresponds to the codebook index i₂in the Rank 1 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 15} corresponds to thecodebook index i₁ in the Rank 1 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index i₂ in the Rank 1 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1,. . . , 15} corresponds to the codebook index i₁ in the Rank 1 sourcecodebook, when the value of the second pre-coding matrix indicatorinformation is i₂ε{0, 1, 2, 3}, the value of the second pre-codingmatrix indicator information corresponds to the codebook index i₂ in theRank 1 source codebook, and when the value of the second pre-codingmatrix indicator information is i₂ε{4, 5, 6, 7}, the value of the secondpre-coding matrix indicator information corresponds to the codebookindex i₂+8 in the Rank 1 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1, . . . , 15}corresponds to the codebook index i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index i₂+4 in the Rank 1source codebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 15} corresponds to the codebook index i₁in the Rank 1 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index i₂+8 in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index └i₁/2┘ in the Rank 1 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1} corresponds to the codebook index 2i₂ in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index 2i₁in the Rank 1 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1} corresponds to the codebook index2i₂ in the Rank 1 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 7} corresponds to thecodebook index └i₁/2┘ in the Rank 1 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1} correspondsto the codebook index 2i₂+4 in the Rank 1 source codebook; or, the valueof the first pre-coding matrix indicator information i₁ε{0, 1, . . . ,7} corresponds to the codebook index 2i₁ in the Rank 1 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1} corresponds to the codebook index 2i₂+4 in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 2i₂+8 in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 2i₂+8 in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 2i₂+12 in the Rank 1 source codebook; or, the value ofthe first pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 2i₂+12 in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, when the value of the secondpre-coding matrix indicator information is i₂ε{0, 1}, the value of thesecond pre-coding matrix indicator information corresponds to thecodebook index 2i₂ in the Rank 1 source codebook, and when the value ofthe second pre-coding matrix indicator information is i₂ε{3, 4}, thevalue of the second pre-coding matrix indicator information correspondsto the codebook index 2i₂+5 in the Rank 1 source codebook; or, the valueof the first pre-coding matrix indicator information i₁ε{0, 1, . . . ,7} corresponds to the codebook index 2i₁ in the Rank 1 source codebook,when the value of the second pre-coding matrix indicator information isi₂ε{0, 1}, the value of the second pre-coding matrix indicatorinformation corresponds to the codebook index 2i₂ in the Rank 1 sourcecodebook, and when the value of the second pre-coding matrix indicatorinformation is i₂ε{3, 4}, the value of the second pre-coding matrixindicator information corresponds to the codebook index 2i₂+5 in theRank 1 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 15} corresponds to the codebookindex i₁ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 2i₂ in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 15}corresponds to the codebook index i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 8+2i₂ in the Rank 1 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 1 source codebook, when the value of the secondpre-coding matrix indicator information is i₂ε{0, 1}, the value of thesecond pre-coding matrix indicator information corresponds to thecodebook index 2i₂ in the Rank 1 source codebook, and when the value ofthe second pre-coding matrix indicator information is i₂ε{2, 3}, thevalue of the second pre-coding matrix indicator information correspondsto the codebook index 8+2i₂ in the Rank 1 source codebook; or, the valueof the first pre-coding matrix indicator information i₁ε{0, 1, . . . ,7} corresponds to the codebook index 2i₁ in the Rank 1 source codebook,when the value of the second pre-coding matrix indicator information isi₂ε{0, 1}, the value of the second pre-coding matrix indicatorinformation corresponds to the codebook index 2i₂ in the Rank 1 sourcecodebook, and when the value of the second pre-coding matrix indicatorinformation is i₂ε{2, 3}, the value of the second pre-coding matrixindicator information corresponds to the codebook index 8+2i₂ in theRank 1 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex └i₁/2┘ in the Rank 1 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 8i₂ in the Rank 1 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 1 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 8i₂ in the Rank 1 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1, . . . , 15} corresponds to the codebook index i₁ in the Rank 1source codebook, and the value of the second pre-coding matrix indicatorinformation i₂=0 corresponds to the codebook index i₂=0 in the Rank 1source codebook; therein, └x┘ represents the greatest integer no greaterthan x.
 15. The method of claim 13, wherein, when the RI value reportedby the terminal equipment that base station receives is 2, the presetcorresponding relationship of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe two codebook indexes i₁ and i₂ in the source codebook, which is usedby the base station to determine the pre-coding matrix, specificallycomprises: the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index└i₁/2┘ in the Rank 2 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index i₂ in the Rank 2 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 2 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index i₂ in the Rank 2 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1, . . . , 7} corresponds to the codebook index └i₁/2┘ in theRank 2 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1} corresponds to the codebook index 4+2 inthe Rank 2 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex 2i₁ in the Rank 2 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 4+i₂ in the Rank 2 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index └i₁/2┘ in the Rank 2 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1} corresponds to the codebook index 4i₂ in the Rank 2 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, . . . , 7} corresponds to the codebook index 2i₁in the Rank 2 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1} corresponds to the codebook index4i₂ in the Rank 2 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, . . . , 15} corresponds to thecodebook index i₁ in the Rank 2 source codebook, and the value of thesecond pre-coding matrix indicator information i₂=0 corresponds to thecodebook index i₂=0 in the Rank 2 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 15}corresponds to the codebook index i₁ in the Rank 2 source codebook, andthe value of the second pre-coding matrix indicator information i₂=0corresponds to the codebook index i₂=4 in the Rank 2 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1, . . . , 15} corresponds to the codebook index i₁ in the Rank 2source codebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index 2i₂ in theRank 2 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1, . . . , 7} corresponds to the codebookindex └i₁/2┘ in the Rank 2 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1} corresponds to thecodebook index 5i₂ in the Rank 2 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, . . . , 7}corresponds to the codebook index 2i₁ in the Rank 2 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1} corresponds to the codebook index 5i₂ in the Rank 2 source codebook;therein, └x┘ represents the greatest integer no greater than x.
 16. Themethod of claim 13, wherein, when the RI value reported by the terminalequipment that base station receives is 3, the preset correspondingrelationship of the first pre-coding matrix indicator information andthe second pre-coding matrix indicator information with the two codebookindexes i₁ and i₂ in the source codebook, which is used by the basestation to determine the pre-coding matrix, specifically comprises: thevalue of the first pre-coding matrix indicator information i₁ε{0, 1, 2,3} corresponds to the codebook index i₁ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, 2, 3} corresponds to the codebook index 4i₂ in the Rank 3source codebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook index4i₂+1 in the Rank 3 source codebook; the value of the first pre-codingmatrix indicator information i₁ε{0, 1, 2, 3} corresponds to the codebookindex i₁ in the Rank 3 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1, 2, 3} corresponds tothe codebook index 4i₂+2 in the Rank 3 source codebook; or, the value ofthe first pre-coding matrix indicator information i₁ε{0, 1, 2, 3}corresponds to the codebook index i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, 2, 3} corresponds to the codebook index 4i₂+3 in the Rank 3 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1} corresponds to the codebook index └i₁/2┘ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, . . . , 7} corresponds to the codebookindex 4·└i₂/2┘+(i₂ mod 2) in the Rank 3 source codebook; or, the valueof the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index 2i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+(i₂ mod 2) inthe Rank 3 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1} corresponds to the codebook index └i₁/2┘in the Rank 3 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index 2i₂ in the Rank 3 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1} corresponds tothe codebook index 2i₁ in the Rank 3 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 2i₂ in the Rank 3 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1}corresponds to the codebook index └i₁/2┘ in the Rank 3 source codebook,and the value of the second pre-coding matrix indicator informationi₂ε{0, 1, . . . , 7} corresponds to the codebook index 4·└i₂/2┘+3·(i₂mod 2) in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1} corresponds to thecodebook index 2i₁ in the Rank 3 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 4·└i₂/2┘+3·(i₂ mod 2) in the Rank 3source codebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1} corresponds to the codebook index └i₁/2┘ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, . . . , 7} corresponds to the codebookindex 2i₂+1 in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1} corresponds to thecodebook index 2i₁ in the Rank 3 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 2i₂+1 in the Rank 3 source codebook;or, the value of the first pre-coding matrix indicator informationi₁ε{0, 1} corresponds to the codebook index └i₁/2┘ in the Rank 3 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 7} corresponds to the codebook index8└i₂/4┘+i₂ in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1} corresponds to thecodebook index 2i₁ in the Rank 3 source codebook, and the value of thesecond pre-coding matrix indicator information i₂ε{0, 1, . . . , 7}corresponds to the codebook index 4└i₂/4┘+i₂ in the Rank 3 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook indexi₂ in the Rank 3 source codebook; or, the value of the first pre-codingmatrix indicator information i₁ε{0, 1, 2, 3} corresponds to the codebookindex i₁ in the Rank 3 source codebook, and the value of the secondpre-coding matrix indicator information i₂ε{0, 1, 2, 3} corresponds tothe codebook index i₂+4 in the Rank 3 source codebook; or, the value ofthe first pre-coding matrix indicator information i₁ε{0, 1, 2, 3}corresponds to the codebook index i₁ in the Rank 3 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, 2, 3} corresponds to the codebook index i₂+8 in the Rank 3 sourcecodebook; or, the value of the first pre-coding matrix indicatorinformation i₁ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook indexi₂+12 in the Rank 3 source codebook; or, the value of the firstpre-coding matrix indicator information i₁ε{0, 1, 2, 3} corresponds tothe codebook index i₁ in the Rank 3 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1, 2, 3}corresponds to the codebook index 8·└i₂/2┘+(i₂ mod 2) in the Rank 3source codebook; or, the value of the first pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index i₁ in theRank 3 source codebook, and the value of the second pre-coding matrixindicator information i₂ε{0, 1, 2, 3} corresponds to the codebook index8·└i₂/2┘+(i₂ mod 2)+2 in the Rank 3 source codebook; therein, └x┘represents the greatest integer no greater than x and i mod 2 representsthe remainder of dividing i by
 2. 17. The method of claim 13, wherein,when the RI value reported by the terminal equipment that base stationreceives is 4, the preset corresponding relationship of the firstpre-coding matrix indicator information and the second pre-coding matrixindicator information with the two codebook indexes i₁ and i₂ in thesource codebook, which is used by the base station to determine thepre-coding matrix, specifically comprises: the value of the firstpre-coding matrix indicator information i₁ε{0, 1, 2, 3} corresponds tothe codebook index i₁ in the Rank 4 source codebook, and the value ofthe second pre-coding matrix indicator information i₂ε{0, 1, 2, 3}corresponds to the codebook index 2i₂ in the Rank 4 source codebook; or,the value of the first pre-coding matrix indicator information i₁ε{0, 1,2, 3} corresponds to the codebook index i₁ in the Rank 4 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, 2, 3} corresponds to the codebook index4·└i₂/2┘+3(i₂ mod 2) in the Rank 4 source codebook; or, the value of thefirst pre-coding matrix indicator information i₁ε{0, 1, 2, 3}corresponds to the codebook index i₁ in the Rank 4 source codebook, andthe value of the second pre-coding matrix indicator information i₂ε{0,1, 2, 3} corresponds to the codebook index 2+i₂ in the Rank 4 sourcecodebook; the value of the first pre-coding matrix indicator informationi₁ε{0, 1} corresponds to the codebook index └i₁/2┘ in the Rank 4 sourcecodebook, and the value of the second pre-coding matrix indicatorinformation i₂ε{0, 1, . . . , 7} corresponds to the codebook index i₂ inthe Rank 4 source codebook; or, the value of the first pre-coding matrixindicator information i₁ε{0, 1} corresponds to the codebook index 2i₁ inthe Rank 4 source codebook, and the value of the second pre-codingmatrix indicator information i₂ε{0, 1, . . . , 7} corresponds to thecodebook index i₂ in the Rank 4 source codebook; therein, └x┘ representsthe greatest integer no greater than x and i mod 2 represents theremainder of dividing i by
 2. 18. The method of claim 13, wherein, whenthe RI value reported by the terminal equipment that base stationreceives is 1, the preset corresponding relationship of the pre-codingmatrix indicator information with the codebook index pair (i₁, i₂)composed of the two codebook indexes in the source codebook, which isused by the base station to determine the pre-coding matrix,specifically comprises: the value of the pre-coding matrix indicatorinformation iε{0, 1, . . . , 15} corresponds to the codebook index pair(i₁, i₂) in the Rank 1 source codebook, therein, i₁=i and i₂=2 (i mod2); or, the value of the pre-coding matrix indicator information iε{0,1, . . . , 15} corresponds to the codebook index pair (i₁, i₂) in theRank 1 source codebook, therein, i₁=i and i₂=8+2·(i mod 2); or, thevalue of the pre-coding matrix indicator information iε{0, 1, . . . ,15} corresponds to the codebook index pair (i₁, i₂) in the Rank 1 sourcecodebook, therein, i₁=i and i₂=i mod 4, or, the value of the pre-codingmatrix indicator information iε{0, 1, . . . , 15} corresponds to thecodebook index pair (i₁, i₂) in the Rank 1 source codebook, therein,i₁=i and i₂=8+2·(i mod 4); therein, i mod 2 represents the remainder ofdividing i by 2 and i mod 4 represents the remainder of dividing i by 4.19. The method of claim 12, wherein, the source codebook, specificallyrefers to: codebook for 8 antenna ports in LTE-A system.
 20. A basestation, wherein, comprising: a setting module, used to set acorresponding relationship of the pre-coding matrix indicatorinformation with the codebook index in the source codebook; a sendingmodule, used to send control signaling to terminal equipment to informthe terminal equipment that channel state information feedback is neededand feedback mode to be used by the channel state information feedback;a receiving module, used to receive RI and pre-coding matrix indicatorinformation that terminal equipment reports as per the feedback modethat the sending module informs; a determination module, used todetermine a pre-coding matrix according to corresponding relationship ofpre-coding matrix indicator information with the codebook index in thesource codebook that setting module sets according to the RI value andthe value of pre-coding matrix indicator information that the receivingmodule receives.
 21. The base station of claim 20, wherein, thedetermination module, specifically used to: determine a pre-codingmatrix according to the RI value and the corresponding relationship ofthe first pre-coding matrix indicator information and the secondpre-coding matrix indicator information with the two codebook indexes i₁and i₂ in the source codebook set by the setting module when thepre-coding matrix indicator information reported by the terminalequipment that receiving module receives specifically comprises thefirst pre-coding matrix indicator information and the second pre-codingmatrix indicator information; or, determine a pre-coding matrixaccording to the RI value and the corresponding relationship of thepre-coding matrix indicator information with the codebook index pair(i₁, i₂) composed of the two codebook indexes in the source codebook setby the setting module when the pre-coding matrix indicator informationreported by the terminal equipment that receiving module receivesspecifically refers to a piece of pre-coding matrix indicatorinformation; or, determine a pre-coding matrix according to the RI valueand the corresponding relationship of the pre-coding matrix indicatorinformation pair composed of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information withthe codebook index pair (i₁, i₂) composed of the two codebook indexes inthe source codebook set by the setting module when the pre-coding matrixindicator information reported by the terminal equipment that receivingmodule receives specifically comprises a pre-coding matrix indicatorinformation pair composed of the first pre-coding matrix indicatorinformation and the second pre-coding matrix indicator information; or,determine a pre-coding matrix according to the RI value and thecorresponding relationship of the pre-coding matrix indicatorinformation with the two codebook indexes i₁ and i₂ in the sourcecodebook set by the setting module when the pre-coding matrix indicatorinformation reported by the terminal equipment that receiving modulereceives specifically refers to a pre-coding matrix.
 22. (canceled)